Step 1: Assemble the Box

Measure and mark four boards to a length of 51" and four more boards to 5-1/2".

Set the miter saw to a 45 degree angle, then cut both ends of all the boards.

Using a 3" hole saw, cut out a hole in the center of the two 51" boards. Sand, then polyurethane the exposed sides of each board.

Assemble the box using finish nails.

Step 2: Feed the Wires and Screw the Board to the Wall

Feed the light fixture wires through the 3" hole, then attach the lamp to the board using mounting screws.

Locate and mark the studs in your wall, then pre-drill corresponding holes in the lamp board. Position the board, then screw it to the wall.

Step 3: Make the Electrical Connections

Make the electrical connections or have an electrician do the work.

Put the bulb in the fixture.

Step 4: Finish the Installation

Add a bead of wood glue to each of the 45 degree ends.

Then nail the two 5-1/2" pieces to the ends of the remaining two 51" boards. Hold that in place and nail it to the baseboard on the wall